Harrow.



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' HARROW. APPLIOTION FILED JULY 17l 1908.

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HARROW.

APPLIoATIoN FILED JULY 17, 190s.

Patented July 27, 1909.'

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OSCAR'H. OLSON, OF MOUNT VERNON, SOUTH DAKOTA.

HARROW.

To all whom it may concern:

Be it known that l, OSCAR ll. OLSON, a citizen of the United States,residing at Mount Vernon, in the county of Davison and State of SouthDakota, have invented certain new and useful Improvements in l-larrows,of which the following is a specifin cation.

This invention relates to an improvement in harrows, and has for anobject to provide a harrow which will be simple in construction, whichmay be manufactured at a relatively low cost, and which will include aframe and a plurality of tooth holding members which may be operated toset the teeth ofthe harrow at different angles to suit various workingconditions.

A further object of this invention is to provide a harrow the teethholding elements of which may be conveniently and quickly disengagedfrom between the divergent yieldingly held frame bars.

Other objects and advantages will be ap parent from the followingdescription and it will be understood that changes in the specificstructure shown and described may be made within the scope of the claimsand that any suitable materials may be used without departing from thespirit of the invention.

ln the drawings forming a portion of this specification and in whichlike numerals of reference indicate similar parts in the several views,Figure 1 is a top plan view of the harrow, Fig. 2 is a verticallongitudinal sectional view therethrough, on the line 2-2 of Fig. 1,Fig. 3 is a vertical sectional view on the line 3 3 of Fig. 1, withportions removed, Fig. 4 is a side elevational view, Fig. 5 is ahorizontal sectional view on the line 5 5 of Fig. 4.

Referrin1 now more particularly to the drawings, fhere is shown a harrowconsisting of a frame formed of a single strip of sheet or strapmetal-which is bent V-shaped to form the outwardly diverging yieldinglyheld members 7 and 8 connected by means of the curved bight portion 9.This curved portion is pierced and is thus arranged to receive adrafthook 10, as shown.

The members 7 and S are provided upon their inner faces.with spacedgudgeons 15 which are each provided with'the securing flanges 13, asshown in Fig. 5, these gudgeons being secured to the frame members bymeans of rivets or similar fastening devices Specification of LettersPatent.

Application filed July 17, 1908.

Patented July 27, 1909.

Serial No. 914,023.

14. Each gudgeon is provided with a hub enlargement 12 for a purpose tobe hereinafter described.

Disposed between the divergent members 7 and S of the frame there isshown a plurality of pipe sections 16 to properlyfit between the frameand which are engaged at their ends with the gudgeons 15 carried by thejust described flanges, the tubes 16 being thus arranged for rotarymovement. Each pipe section is provided ivith a plurality of alinedpairs of passages forming tooth openings which receive the threadedshanks of the harrow teeth 18. The threaded ends 17 of the harrow teethreceive the clamping nuts 19, one nut being arranged above the pipesection and the other nut being disposed beneath the pipe section, asshown in Fig. 3.

Midway between theends of the frame, each of the members 7 and 8 isprovided with an opening, and these openings are adapt ed to receive theends of a transversely disposed clamping rod 21. One end of the rod ispreferably headed as indicated at 22, and the other end of the rod isthreaded for the reception of a clamping nut 23. lt will thus be yseenthat by the provision of the transversely disposed rods the members 7and 8 of the frame may be moved toward or away from each other, therebypermitting the tooth carrying tubes to be clamped between the framemembers 7 and 8. T he gudgeons 15 may be disen aoed from or enga `edwith u C b the ends ofthe pipe sections as will bereadily understood.

Each pipe section is provided with a centrally located rock arm 24, eacharm having a perforated curved portion 25 arranged to conform to thecurvature of its pipe section, and each arm is secured to a pipe sectionby means of suitable clamping bolts 5.

A longitudinally disposed rock bar 26 is ivotally connected as indicatedat 27 to the arms 24, and adjacent to the rear ends the bar 26 isprovided with a rack segment 28. One pipe 15 is provided with anupwardly' extending hand lever 29 which carries a spring operatedsliding dog 30 for engagement with the segmental rack as will be readilyunderstood. Upon movement of the operating lever 29 the pipe sectionswill be revolved whereby the position of the teeth may be given anydesired angle.

The hub enlargements 10 serve as bearing surfaces upon which the tubeends press,

the bearing surface extending obliquely to the plane of the flanges 13,as shown in Fig. 5. And

Having thus described my said invention, what I claim as new and desireto secure by United States Patent is:

A hai-row comprising a strap metal V- shaped frame, to provide twoyieldingly held divergent frame bars, having in combination a draft hookprojecting from the bight portion of said frame, a plurality of gudgeonssecured to the inner opposite faces of said. frame bars, each gudgeonbeing provided with an inwardly directed trunnion, a plurality ofperforated tubes of different lengths revolubly held upon saidtrunnions, a plurality of harrow teeth within the perforations of saidtubes, a rock arm secured to each of said tubes, a rock bar connectingall of said arms, means to clamp said yieldingly heldy frame barsagainst said tubes, and niechan* ism to adjustably hold said connectingbar.

2. A barrow comprising a strap metal V- shaped frame, to provide twoyieldingly held divergent frame bars, having in combination a draft hookprojecting from the bight portion of said frame, a plurality of gudgeonssecured to the inner opposite faces of said frame bars, each gudgeonbeing provided with an inwardly directed trunnion, a plurality ofperforated tubes of different lengths revolubly held upon saidtrunnions, a plurality of harrow teeth within the perforations of saidtubes, a rock arm secured to each of said tubes, a rock bar connectingall of said arms, a threaded clamping bar carried by said divergentframe members, a nut upon said bar to clamp said frame members againstsaid tube, and an operating lever secured to rock bars, as and for thepurpose set forth.

In testimony whereof l affix my signature, in presence of two witnesses.

OSCAR H. OLSON.

Witnesses:

C. L, BEATY, E. L. BRIDGE.

